Flexible valve



S. KHALIL FLEXIBLE VALVE Nov. 6, 1951 2 SHEETSl-SHEET l original Filed April lo, 1947 T N m/ e WM w w y S. KHALIL FLEXIBLE VALVE Nov. 6, 1951 l2 sx-xEETs-SHEET 2 Original Filed April 10, 1947 as 52 53 FIG. 9

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Patented Nov. 6, A1951 :l i

UNITED STATES PATENT OFFICE FLEXIBLE VALVE y Seyed Khalil, New York,`N. Y. original imputation April 1o, 1947, serial No. i

740,530, now Patent No. 2,524,808, dated October 10, 1950. Divided and this application July 21, 1947, Serial No. 762,271

l This invention relates to Improvementsv in Flexible Valves, and is more .particularly adapted to be used with the secondary tube of my own pneumatic tire for which an Aapplication-Ser.

No. 740,530, ledApril'lO, 1947 has maturedinto is secured to the primary tube, will be referred to as the primary valve.

One object of this invention is to provide a primary valve and a secondary valvel for said primary and secondarytubes, respectively, eX- tending out through the rim. The inlet of one of said valves extends through the existing opening (which is generally u'sedfor` the passage of a valve of the prior' art) and provides an extra opening similar to said existingV opening to accommodate the passage of the inlet of the other valve therethrough. l

Another object of this invention is to provide a solid short valve`for` said primary tube and a long and exible valve for said secondary tube so that said flexible valve. due to its'length, passes from said secondary tube through the chamber occupied by the primary tube and thence tothe rim; and due to its ilexibility,'sustains the ilexure of the tire.

Still another object of this inventionk is to provide an individual valve for each tube so that a small amountl of air maybe admitted in the secondary tube after it has been mounted in the casing and before the shield is mounted in'said casing.

Another object of this inventionis to provide an individual valve for each'tube so that asmall amount of air may be admitted in the primary tube after it had been 'mounted'in the'casing and before the casing is mounted on the rim. This is similar to the prevailing practice inthe mounting of a single tube'in the casingand'the mounting of the casing on the rim. Still another object of thisinv'ention is to provide an individual valve' for each'tube s o that the air pressure inv eaclfrtube can be tested" (by the standard gauges) to* determine by a conl`- trast between the normal' air pressure, per square inch, and the lost lair` pressure (if and when' there is aloss Vof 'air pressure? whether ther'e'is an air leakage the tube. :For instancefifthe" normal 19 Claims. (Cl. 152-340) air pressure was twenty-four pounds in the primary tube and six pounds in the secondary tube, and ifa test of primary tube shows no loss of 'air pressure while a test of secondary-tube shows a loss of three pounds of air presure, it willbe an indication that there is a leakage in said secondary tubeas three pounds is equal to onehalf of the normal air pressure of said secondary tube. Had a test been madeof the combined air pressure in Yboth tubes, the loss of three pounds of air pressure would notindicate any leakage as three pounds is ten percent (10%) of the total air pressure in both tubes.

Yet another object of this invention is to pro'- vide an individual valve for each tube so' that either a given amount of air pressure be admitted in one of said tubes, or an unproportional amount of air pressure be admitted' in both of said tubes.

Another object of this invention is to provide an individual valve foreach tube so that each of said tubes may be partially inflated for testing by the prevailing process',- such as for example submerging each tube in' a 'tank of water to rind out (by bubbling ofthe waterl" whether' there is a leak in the tube.` v

A further object of this invention isto provide an individual valve foreaeh tube so that-the presence of tlfie'tvlovalves` on the outside of the rim conspicuously indicate that the tire is my invention Whichhas two tubes,'shield, etc. One of the advantages of this is to show by a'birds eye to a garage man, repair man, etc.; what kind of tire it is and consequently how to handle it. Still another object of this invention isto provide a plug adapted to closesaid 'extra opening (which is madefor the passage of the second valve) in the rim wlrene'ver'a single tube of the prior art is to be mounted in the casing instead of my primary and secondary tubes. l

" Mechanism "of kmy 'valves tened to the secondary tube, because; first, the" secondary tube requires a much longer valve than the primary tube does, as said valve has vto pass from the secondary chamber (throughvaslot in the shield between the tubes) tothe .primary l chamber and thence through Jthe rim; and, 'sec-` ondly, since the depth of the casing, and particularly the depth of the primary chamber -due to the fiexure alternately changes, the part of `the secondary valve which passes through .the

Yprimary chamber, mustcomply to said iiexure.

- Consequently, vI have invented, for my second- `ary tube, a novel valve whichis called herein a flexible valve, andwhich will be `presently defocribed'.

My flexible vvalve consists of two parts which `are called herein an inlet part, and extension par-t, respectively. One end -of said vextension part is fastened (preferably vulcanized) to vthe `secondary tube, while the other end thereof is fastened to the innerend of said inlet part.

The extension `part passes through the casing Vwhile the inlet part Aprojects through the rim. Accordingly, the length of said extension part-is :much longer than that of the inlet part.

The inletpartis similar in design and function to many a valve of the-prior art whichis usedin va pneumatic tire. It extends from saidrim through van opening which is provided for this purpose, and which is `similar to the opening through which the valve of the primary tube passes outfrom the rim.

The `extension part is made of a 'tubing which has both sufficient flexibility to comply with dlexure -of the casing and enough resistance against the required air pressure for the casing no as 'to .resist the pressure which is exerted upon 'it-from the vprimary tube. Itis, preferably, made of a Vstiffer rubber with reinforcing means therein.

It is .designed :to lie in fiat contact with the inner face of the casing, and ato provide a smooth arcuate contact with the primary tube. It bears against the inner side of the casing and Vremains .firmly inY its positionv by meansV of two dowel 'pins which are carried bya reinforcing plate se- Scured on `the secondary tube, Awhich engage corresponding dowel holes ifonned in the annular shield between the primary and secondary tubes, and by means of its two `bolts which are extended through the rim and held there by two nuts.

' Thus, in addition to the-ordinary hole for the valve of the primary tube, three more holes are provided inthe rim, one of which vis for the pas- `sage of the secondary valve, as previously described, and .the vremaining two holes are for the passage of said two bolts.

These three additional .holes can be made :in the rim 'by a mechanic or 4worker in any garage `with'a simple drilling device.

Itl is believed that the distinctive amtiearanceV o'i tires made according to the invention will in time come to be recognized` as a "Symbol 4o1 The drawings In the accompanying drawings:

Fig. 1 is an elevation of the complete tire assembly on a rim and shows two valves which extend outside of the rim, so that both tubes may be inflated individually t the required pressures; A,

Fig. 2 is an enlarged section taken along the lines 2-2 of Fig. 1;

Fig. 3 is an enlarged sectional view taken along theline 3-3 of Fig. 1;

Fig. iy is an enlarged fragmentary sectional view taken along the line 4-4 of Fig. 2;

Fig. 5 is 1an enlarged fragmentary view of a reinforcing member built into the secondary tube to span-clearance slots formed in the shield ele- 4ments;

Fig. crepresents one element of the shield;

Fig. 7 represents anoidier element of the shield;

Fig. 8 shows the method ofmounting the :shield ofFig. Y6in acasing after the secondary tube had lb'een mounted in said casing;

Fig. 9 shows .diagrammatically the shield element .of `Figures -6 and '7-in interlocking relation, which is the .relationthey assume when assembled in the tire;

Fig. 10is a side elevation 4oi.' a closuremember which may, lin .a special case, be used to close .three of the four holes on the `.rim of Fig. 1;

l Fig. 11 is a planvview of vthe closure member shown in Fig. 10; and Y Figure 121s an elevation partly in section taken at right angles `to theplane of .Figure 2 as indicated on Figure 1.

Referring to the drawings, a rim 20 has a casing 2| mounted thereon and within the casing are my primary tube ISB-.and .secondary tube A23 with my shielding means (to lbe presently described) therebetween. w

Now, in order -tosupply air to the secondary ltube 23 I have `devised anfimproved valve having an extension part 24 4having an air passage 24h therein. This extension has a fiat face 24d which bears against the inner wall of thecasing 2| and the opposite face vof Vthe extension, designated 24'c, has ya curved face which is spanned by a Aportion of the wall of the primary tube 66. The extension is lsecured to a .reinforcing plate 25 which is vulcanized 'onto the secondary tube to reinforce its air opening `and to bridge clearance notches formed in myshield, which is preferably between the primary tube and the secondary tube, which will be presently described. 'I'he extension is provided with :a flap 24! to reinforce the joint betweenthe plate `25 andthe extension.

'The extension 24 maybe formed of a less flexible rubber or the likethan is used in forming the primary and secondary tubes and also the exten- .sion .24 may `have reinforcing means 241 embedded in the materialto prevent it from collapsing and the iciassage 24h therein from closing, when 'the primary tube i6 :is inflated. The extension 24, .near its extremity, has imbedded therein a flat Vmetallic plate i9 which supports the `valve member 22, said valve member projected downwardly from the plate as viewed in Figure 12, and spaced apart from the valve mem- Vber 22 on each side vthereof are depanding bolts l29'and 30., which are yengaged by nuts 3| and 32 as seen in Figure l. When-the .rim 20 has three aligned holes formed therein, one to accommodate the valve member-22 and the other two to accommodate the bolts 202.130, jthe reinforc- .ing plate.i9,.spanl,alijthree ,of the holes injthe thereof, and adjacent to the end 63 is a rim, and when the tire is being assembled,r the extended portion 24e is positioned, as pointed out above, with the Valve 22 extending through the central larger hole and the studs 29 and 30 ex- 'tending through the smaller holes on either side of the larger hole. Then the nuts 3| and 32 are applied to hold the tube in place before the tire is inflated. After the tire is inflated, obviously the air tends to hold the extension in place but the bolts act at all time to prevent any relative movement between the rim and the extension portion.

I vMy shield between theprimary and secondary tube is comprised of a metallic member 50,

shown in Figure 6, and a secondmember A5|,

which is lshown in Figure 7.

Adjacent to the end 60 of the shielding member 50 is a hole 58a; about a third of the length of the member 50 away from the ends'. 60 are dowel holes 56a and 51a; and about two-thirds of the length. of the member from .the end 60 is a clearance slot 52 with dowel holes 21aand 28a on either side thereof, and adjacent to the 'end 6| is a dowel hole 59a.

Adjacent to the end 62 of the shielding mem- "it will enter the opening Zia in the casing. After it is inserted, it is allowed to expand andthe member 5|, spiraled, as shown in Figure 7,' is inserted, and this is allowed to expand. The dowel 56 is inserted into the dowel holel 56a; then, the dowel pins 58 and 59 are inserted, respectively, in the dowel holes 58a and 59a near the abutting ends of the shield member 50, and then the dowel 51 is inserted into the dowelhole 51a. Since these members are springy, and vsince Ithe points of engagement are approximately a hundred and twenty degrees' apart, the assembling of these two elements Vis very easy and the clearance slot 53 is positionedA to clear the valve member 24 by the engagement of the dowel holes 21a and 28a'on either side of the clearance slot with the dowel pins 21 and 28 which extend inwardly through the shield member 25. Followfing this, the primary tube 66 is positioned in the casing and the whole array is then placed on the rim 20.

In placing the array on the rim, the valve head 22 is inserted in the center hole of the three holes formed in the rim and the threaded bolts 29 and 30 extend through the holes on each side of-jthe center hole, and have securing nuts 3| and 32,*respectively, applied thereto. Then, the valve 65 of the primary tube 66 is pulled into the fourth hole formed in the rim for that purpose. Air under pressure delivered through the valve 22 will innate the secondary tube only, as diagram#- matically shown in Figure- 2, while air under pressure delivered through the valve 65 will inflate tube 66 only, as shown diagrammatically in Figure 3. f

In instances where the rim is provided with three extra holes, such as are used with my new and improved tire, and it is desired to ruse a regu.'- lar tire on said rim, the device illustrated in Figi ures l and l1 may be-used to.close these three 110Ies` i 7510i said shield .being vequidistant from the lcentral ingZI.

. Referringto Figures 10 and 11, a'rectangular body 69 isprovided with a beveled boss 12 which fits the. center of the three holes in the rim, and spaced apart from this boss are threaded studs 10 and 1|. These extend through the holes on each side of the center hole and the device may be secured in position on the rim by the nuts 3| and 32.

Assembling the tire on the rim The assembling of my tire is done in the following order:

(a) Insert the secondary tube23 in the cas- V(b) Partially inflate said secondary tube via the valve 22.

(c) Insert the shield 50 in said casing 2|, as shown in Fig. 8. Notice in Fig. 8 the extension 24 extends through the slot 52 of the shield 50.

(d) Then, let said shield 50 unwind and take its normal outline; thereafter insert the shield5l',

and see to it that the four pins 56, 51, y58 and 59 of the shield 5| enter the holes 56a, 51a, 58a and 59a, of fthe shield 50, as shown in Fig. 9, in which for claritys sake the two shields are shown thicker than normal proportion.

(e) Be sure that the dowel pins 21 and 28 are entered in their respective holes 21a and 28a in the shield'50, 5|, as shown in Figs. l and 2.

" (f) Insert the primary tube 66 in the casing 2| taking care that the flat side 24a'J of the extension 24 contacts the inner wall of the casing 2| and consequently the curved side 24e of said extension faces the primary tube 66. y

(y) Partially inflatel primary tube 66 via its valve 65, making sure that said extension 24 is not twisted or displaced.

(h) Mount the array (easing 2| the tubes and the shields), on the rim 28 as in the usual manner. Pass Vthe two valves through their respective holes in the rim. In doing so, care should be taken that the two bolts 29 and 30 extend through their respective holes in the rim. Then, screw the two nuts 3| and 32 onto the bolts 29 and 30, respectively, and finally, complete the inflating of both said tubes (the secondary via ments in Pneumatic Tires.

What is claimed is:

1. In a tire, a casing, a pair ofv pneumatic tubes in said casing, annular shielding means disposed between said tubes and extending laterally across the 'interior of said casing from wall to wall and dividing the interior of said casing into isolated chambers, a notch formed in one edge of said shielding means to provide a clearance passage therethrough, an elongated iiexible conduit extending to the outer of said tubes and adapted to extend radially along the inner wall of said casing via said passage, and a valve carried in the end of said conduit. 'Y

2. In a tire, a casing, a tube within said casing adjacent to the tread thereof, a ring-like shield within said casing and forming therewith an isolated chamber for said tube, the periphery axis of said casing, a clearance passage formed in said shield, an elongated flexible conduit secured to said tube and extending via said passage and along the inner surface of said casing to a position where a valve carried in the end thereof may extend through the rim upon which said tire is to be mounted, and a second tube within said casing and having its outer periphery bounded by said shield, the side well of said second tube when inflated being adapted to span and partially embrace said flexible conduit Where it lies in Contact with the inner Wall of said casing.

3, The invention according to claim 2, in which said first mentioned tube has secured thereto a reinforcing plate adapted to overlie said clearance passage when said tube, said shield and Said valve are assembled within said casing.

4. The invention according to claim 2 in which said ring-like shield to facilitate the mounting of the same in said casing is comprised of at least two flexible metallic strips having clearance notches formed therein and adapted to be interlocked with said notches in alignment to form said` clearance passage via which said flexible conduit passes, the abutting ends of one of said strips being circumferentially spaced with respect to the abutting ends of the other.

5. In a tire, a casing, a tube within said casing, a ring-like shield in said casing comprised of a pair of interlocking springy metallic strips having aligned notches therein to form a passage, the abutting ends of one of said strips being circumferentially spaced with respect to the abutting ends of the other, a reinforcing plate secured to said tube, an elongated flexible conduit extending from said reinforcing plate via said passage with said reinforcing plate overlying said passage and extending to a position outside of said casing where a valve carried by its inlet end may pass through a rim upon which said tire is to be mounted, and a second tube within said casing bounded on its outer periphery by said ring-like shield and bounded on its inner periphery by said rim.

6. In a pneumatic tire, a casing having a plurality of tubes therein with partition means 'therebetween, said partition means isolating said tube from contact with each other, notch means extending into said partition means from one edge thereof and forming a clearance passage, an elongated flexible conduit connected to one of said tubes and extending through said clearance passage, and a valve carried in the outer end of said conduit.

7. In a pneumatic tire, a casing having a pair of tubes therein with isolating means 'therebetween, said isolating means being comprised in part of an annular shield made of two interlocked metallic strips having a clearance passage formed therein from one edge thereof by notches in each which notches are aligned by the interlocking of said strips as they are assembled into said casing, and formed in part by a reinforcing plate secured to the outer of said tubes, and an elongated flexible conduit passing through both said rectangular shield means and said clearance passage.

8. In a tire, a casing adapted to be mounted on a rim, a tube within said casing, a ring-like shield within said casing bounding said tube and having its periphery parallel to and concentric with the axis of said casing, an elongated flex- -ible conduit extending from said tube via a clearlln'ce.passage.formed -in said shield ifo-an', openiht 8 formed in said rim, a valve carried in the end of said conduit, and a second tube within said cuving and having its outer periphery also bounded by said shield, said second tube having a valve extending through a second opening formed in said rim, said tubes being adapted to be individually inated via their respective valves.

9. The invention according to claim 7 in which dowell means is provided for maintaining said reinforcing plate and the clearance passage in said annular shield in registration.

10. A pneumatic tube having an elongated flexible conduit extending therefrom and comprised of an inlet part and an extension part, said inlet part carrying a valve per se and said extension part being of a D-shaped cross-section so that the flat portion thereof is adapted to contact the inner wall of a casing in which said tube is to be mounted, and adapted to be immobilized by the inflation of a second tube in contact therewith in said casing.

11. The invention according to claim 10 in which said extension part of said conduit is comprised of rubber-like material of a different consistency from that of said tube.

12. In a pneumatic tube, an elongated conduit including an extension part of substantially D-shaped cross-section and adapted to lie with its fiat face in contact with the inner wall of a casing, said elongated conduit including an inlet part which extends into a substantially rectangular terminal and a valve per se extending laterally from said terminal and having its interior in communication with the interior of said inlet part, and orienting means on said terminal to engagea rim upon which a casing carrying said tube is mounted.

13. A pneumatic tube according to claim 12 in which said terminal has, in addition to the valve per se extending laterally therefrom, a pair of threaded studs adapted to extend through spaced holes in a rim upon which a tire containing said tube is to be mounted, said studs being adapted to be engaged by nuts for retaining said terminal and the valve carried thereby in a fixed position in said tire.

14. In a pneumatic tire, an elongated air conduit including an extension part substantially D-shaped and adapted to have its flat surface to lie in contact with the inner wall of a casing inA which said tube is positioned, said extension part including reinforcing means.

15. In a tire, a casing adapted to be carried on a rim, said rim having two valve holes formed therein and spaced apart from each other, said rim also having two bolt holes adjacent to and spaced on each side of one of said valve holes, said bolt holes forming locating holes, a tube within said casing, a ring-like shield within said casing bounding said tube and having an elongated fiexible conduit extending therefrom via a clearance passage formed in said shield, said conduit having an inlet part from which a valve per se extends laterally and having a pair of bolts spaced on each side of said valve per se equal to the spacing of said bolt holes with respect to the valve hole to which they are adjacent parallel to and spaced apart from said valve, said bolts being adapted to extend through said bolt holes in said rim and said valve being adapted to extend through the valve hole adjacent thereto, and a second tube in said casing having a valve adapted to extend through the other valve hole formed in said rim.

16. In a tire, a casing, a plurality of air com? partments with metallic isolating means therebetween, each of said metallic isolating means being annular in form and extending from wall to wall across said casing, and individual valves for supplying air thereto.

17. In a tire, a casing, a secondary tube having an air inlet hole, a valve adapted to project from a rim upon which said casing is to be mounted, an air conduit extension having substantially D-shaped cross-section, one end being secured to said inlet hole and having the other end secured to said valve, and reinforcing means embodied in said conduit for imparting rigidity thereto thereby enabling it to resist both external and internal air pressure, yet allowing it to yield to the exure of said casing.'

18. A rim having a pair of valve holes formed therein in spaced relation, bolt holes positioned on each side of one of said valve holes, a plate carrying a central boss fitting said last mentioned hole. studs on said plate spaced apart from said boss tting said holes, thereby closing both said valve hole and said bolt holes when it is desired to use said rim with an ordinary casing and tube.

19. In a tire, a casing having a tread, a removable partition therein annular in form with a periphery parallel to and concentric with the axis 10 of said casing, said partition dividing said casing into two isolated chambers, the outer chamber adjacent to said tread being substantially smaller than the other chamber, and valve means including a stem extending from 'said rst-named chamber via said partition and through said other chamber.

SEYED KI-IALIL.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 997,443 Dunn July 11, 1911 1,215,717 Ruthven Feb. 13, 1917 2,203,564 Farnsworth June 4, 1940 2,224,066 Shore Dec. 3, 1940 2,525,752 Khalil Oct. 10, 1950 2,524,808 Khalil Oct. 10, 1950 FOREIGN PATENTS Number Country Date 322,454 France 1902 639,721 France 1928 118,297 Australia 1944 

